Less refined fuels pollute more. Electric furnaces consume 50% more power.
Mods introducing new content into the game.
Changes to power production and distribution.
Like the title states. Possible clashing going on? Also doing it with the fluids I just found out.
Are you using any other mods? At first glance I don't see why this would be a problem (but it's admittedly late and I haven't had my head into modding lately)